CDS – Unhappy Control Path Test Window

There will be a testing window available on Tuesday 07/04/2020 from 2pm – 4pm during which

you will be able to test Unhappy Control Paths in Trade Test. Any paused declarations on the unhappy path submitted in advance will also be processed during this window. 

Further guidance on testing of control tasks in Trade Test can be found in section C.2 of the ‘Trade Test Scenarios’ document.

Please note that queries raised during this window should be raised in the normal way by contacting


Further Questions

Should you have any Trade Test queries or other questions relating to your product development, you can contact the HMRC dedicated Software Developers Support Team mailbox. Queries received through this mailbox are addressed using a triage system to ensure resolution by the Policy, IT and Project Teams.

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